Sewer cap



FIG. 1 is a top, front and left side perspective view of a sewer capshowing our new design;

FIG. 2 is a right side elevational view thereof; the left side viewbeing a mirror of that shown;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a sewer cap, as shown and described.